Meta and Microsoft cut back on Anthropic’s Claude as in-house AI tools mature
Two of Anthropic's biggest enterprise customers are trimming internal Claude usage over cost and competition concerns
Meta and Microsoft, two of Anthropic’s largest enterprise customers, have sharply reduced how much their own employees use Claude. The pullback has played out across 2026 and centers on Claude Code, Anthropic’s AI coding tool.
The numbers behind the pullback
The shift was detailed in a report by The Information on October 5, 2026.
At Meta, internal Claude Code users dropped from roughly 60,000 at the start of the year to about 30,000.
Many moved to Meta’s own tools. MetaCode now has more than 30,000 users, while Muse Code counts more than 6,000.
Meta spent over $105 million on Claude Code during a recent 28-day period, a figure that captures how deep the dependency ran before tighter controls arrived.
Microsoft’s story follows a similar arc. The company had projected its annual internal spending on Anthropic would exceed $1 billion. That projection has since been cut by over a third.
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Monthly budgets were reduced from $100,000 to about $10,000. Microsoft is steering internal work toward GitHub Copilot CLI and OpenAI models instead.
Why this is happening now
The cuts gathered momentum in the spring and summer of 2026. That timing lines up with company-wide cost-management pushes at both firms.
It also coincides with Anthropic’s evolution from supplier into competitor. As Anthropic’s products increasingly overlap with what Meta and Microsoft sell or build, relying on Claude for core engineering work became a stranger arrangement.
Data governance is part of the calculus too. Companies building their own models have reasons to keep internal code and workflows on their own systems, especially as those in-house models mature.
The relationships aren’t over
Microsoft’s investment of up to $5 billion in Anthropic remains in place. Customer-facing usage of Claude through Azure continues to grow, and customer spending on Claude via Amazon’s Bedrock is also increasing.
What this means for Anthropic and the AI market
Anthropic’s IPO prospectus revealed that two unnamed customers account for about 25% of its revenue.
Enterprise AI revenue built on internal employee usage may be more fragile than revenue built on resale through cloud platforms. The Azure and Bedrock growth offers a partial counterweight.